大型矿用车卸矿料槽尘源控制用除尘装置的研究及应用

发布时间：2018-06-15 21:52

本文选题：除尘装置 + 尘源控制　；参考：《东华大学》2013年硕士论文

【摘要】：本课题以某企业大型矿用车卸矿料槽处卸矿过程的扬尘问题作为研究对象,主要研究了矿车在料槽处卸矿过程所形成的扬尘及其特点,以及针对此扬尘所采用的尘源控制方案及除尘装置。在矿车卸矿过程中,矿石自矿车卸入料槽的下落过程及矿石在料槽内的堆积过程均会形成诱导气流,使夹杂在矿石之中的细小粉尘随着诱导气流而溢出料槽,形成扬尘；另外,在现场没有防护的情形下,扬尘在自然风、热气流等二次尘化作用的影响下会造成更大范围的扩散,不但会影响到现场的工艺操作,而且也会污染周围的环境。针对矿车料槽处卸矿过程形成的扬尘：分别采用理论计算和数值模拟的方法对扬尘风量进行了确定；另外,采用数值模拟的方法对卸矿过程形成的扬尘气流进行了分析,为后续尘源控制方案的提出奠定了基础。针对矿车卸矿过程形成的扬尘气流随矿车卸料点的不同而变化的特点,提出了适应于扬尘气流变化的尘源控制方案；根据料槽处的生产工艺和具体环境分别拟定了侧吸式尘源控制方案和吹吸尘源控制方案。针对侧吸式尘源控制方案和吹吸式尘源控制方案,采用了数值模拟的方法对影响尘源捕集效率的主要因素进行了正交试验研究,得到了两种尘源控制方案的捕集效率与其主要影响因素之间的函数关系式。通过对比分析发现：在实现对尘源完全控制的情形下,侧吸式尘源控制方案所需的通风量小,且其系统结构简单；具有初投资小、运行管理方便等的特点,故本课题选用侧吸式尘源控制方案为较佳的尘源控制方案。依据流量比法和π定理,对影响侧吸式尘源控制方案尘源捕集效率的各主要因素进行无量纲分析,结合正交模拟试验结果得到了极限流量比KL的多元回归关联式；基于多元回归关联式对侧吸式尘源控制方案进行了优化。结合优化后的侧吸式扬尘控制方案,设计出新型移动式除尘装置用于矿车料槽处卸矿过程的尘源控制；为今后工程设计提供了参考。
[Abstract]:In this paper, the dust in the unloading process of a large truck in an enterprise is taken as the research object, and the dust and its characteristics in the unloading process are mainly studied. As well as the dust source control scheme and dust removal device. In the process of ore unloading, both the falling process of ore from the unloading tank and the accumulation process of ore in the ore tank will form induced airflow, which will cause the fine dust mixed in the ore to overflow with the induced air flow, forming dust; in addition, Under the influence of natural wind, hot air flow and other secondary dusts, it will cause a wider diffusion, which will not only affect the field operation, but also pollute the surrounding environment. Aiming at the hoisting dust formed by unloading process at the ore tank, the dust volume is determined by the method of theoretical calculation and numerical simulation, in addition, the dust flow formed in the unloading process is analyzed by the numerical simulation method. It lays a foundation for the following scheme of dust source control. In view of the characteristics that the dust flow formed in the unloading process changes with the different unloading points of the truck, the dust source control scheme adapted to the variation of the dust flow is put forward. According to the production process and specific environment of the feed tank, the control scheme of side suction dust source and the control scheme of blowing dust source are worked out respectively. Aiming at the control scheme of side-suction dust source and the control scheme of blowing dust source, the main factors affecting the collecting efficiency of dust source were studied by orthogonal test using numerical simulation method. The functional relationship between the capture efficiency of two kinds of dust source control schemes and its main influencing factors is obtained. Through comparison and analysis, it is found that under the condition of complete control of dust source, the ventilation of side suction dust source control scheme is small, and its system structure is simple, with the characteristics of small initial investment, convenient operation and management, etc. Therefore, the control scheme of side-suction dust source is better. Based on the flow ratio method and 蟺 theorem, the dimensionless analysis of the main factors affecting the efficiency of dust collection in the control scheme of side suction dust source is carried out, and the multivariate regression correlation of the limit flow ratio KL is obtained by combining with the results of orthogonal simulation test. The control scheme of side-suction dust source is optimized based on multi-regression correlation. Combined with the optimized side suction dust control scheme, a new type of mobile dust removal device is designed for the dust source control of the unloading process at the mine car tank, which provides a reference for the future engineering design.
【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD714.4

【参考文献】